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Editor's pickLearn why unknown is safer than any in TypeScript and how to validate API JSON at runtime with type guards, error handling, and practical examples.
Compare structuredClone, JSON serialization, and shallow copies to clone JavaScript objects while preserving Dates, Maps, nested data, and circular references.
Learn why JSON.stringify throws on circular references, how to build safe API payloads, and when a circular-aware serializer is the right choice.
Build a browser-based JSON diff tool with parsing, recursive object comparison, array handling, missing-property detection, tests, and safe visual highlights.
Build a JavaScript JSON formatter and validator with JSON.parse and JSON.stringify. Handle indentation, syntax errors, tests, and large-input trade-offs.